解释~~

Question

onclick=XsetDate1("fromdate")其中:
function XsetDate1(xxx){
  document.querysetting.fromdate.value="";
  setDate(xxx);
}请问,怎样解释这个JS?

Answer 1

其中:
function setDate(id)
{
  try { newwin.close(); } catch(Exception) {}
  td = document.forms[0].all[id].value;
  today = new Date();
  if (td == "") {
    year = today.getYear();
    if (year<100) year += 1900;
    month = today.getMonth()+1;
  } else {
    year = td.substring(0,4)-0;
    month = td.substring(5,7)-0;
  }
  newwin = window.open('','','height=240,width=164,top='+(event.screenY-100)+',left='+event.screenX);
  newwin.document.write(getHTML(id,year,month));
}

Answer 2

document.querysetting.fromdate.value=""; 设置为空
querysetting和fromdate是HTML元素名称